Pallet for sintering machines



Nov. 1, 1932. H. J, 'STHLI 1,885,152

PALLET FOR SINT'ERING MACHINES Filed Jan. 8. 1932 ATTORNEY Patented Nov. l, 1932 TUNTED' STATES HENRY J. STEHLI, oF CEDAR GROVE, NEW JERSEY i vBALLET Eon srN'rEniNefrY MACHINES Application filed January 3; 1932. y Serial No. 585,502.-

Pallets for sintering machines are provided with openings for the passage of air, and

apertured gratebars are removably secured upon the pallets over vsaid openings, the ma- 5 terial to be sintered being charged upon said gratebars. During the passage of the pallets over the sintering machine the gratebars be come heated, and when the pallets run down the curved tracks at the discharge end of the l machine one pallet will bump against the line of pallets ahead, and there is a tendency for the gratebars, when they are hot, to become bowed or bent sideways from the repeated lows. Furthermore, the heat to which the i" grate bars are subjected tends to cause the metal thereof to warp or to soften and decrease its stiffness, and the weight of the charge upon the heated gratebars frequently causes them to sag or bend downwardly at 39 their centres, causing them to be discarded long before otherwise necessary.

The object of my invention is to overcome the warping, bending and sagging of the gratebars of pallets above referred to where- ``l by to render them more ethcient and increase their usefulness.

n In carrying out my invention I provide a pallet, that has openings between its transverse ribs, with projections or lugs extending 3 from the ribs into the openings, opposing proj ections or lugs being spaced apart, and gratebars having depending longitudinally extending ribs adapted to fit in the spaces between the projections or lugs and to engage the lat- 35 ter when the pallet runs down the discharge track of a sintering machine to resist sideways bowing or bending of the gratebars. Said projections or lugs are located ina desired position to be engaged by the superim- 0 posed gratebar, whereby to aid in supporting the latter and to resist sagging or downward' bending ofthe latter during use.

Reference is to be had to the accompanying drawing, wherein Y t" Fig. l is a plan view of a pallet embodying my invention;

Fig. 2 is a section on line 2, 2 in Fig. l A

Fig. 3 is a cross section on line 3, 3 in Fig. l,

and Fig. 4 is a side View ofV a gratebar. @o The pallet illustrated in thepdrawing is -or kbending ofthe gratebars.

and outwardly-inclined' sides, and may be 1 substantially in inverted V-shape with inclin- .ing sides 5', with the apex extending upfgenerally. of usual-or conventional construc tion comprising a` metal casting having transverse-ribs 2 spaced apart by intervening openings 3 extending transversely of the pallet. Tie-bars 4 betweenthe ribs and in the 55 openings, cast with the ribs, stiifencthe-latter laterally. Along the inner surfaces of the f ribs 2r are located Vlaterally extending projections or lugs 5, which may be cast integral lwith said ribs, said projections or lugs being show n arranged in opposingpairs in the openmg or space between two adjacent ribs .2. f The gratebars 6, which may be of'usual construction, are shown provided with open- Vings 7 for the passage of air, and said grate- G5 bars are shown provided with depending longitudinal ribs 8 which are adapted to it in the j spaces '5a between spaced or opposing projections `or lugs 5 and suiiciently close to the ends of said projections as to engage the o latter under some conditions. The upper surfaces of theprojections or lugs 5 are prefcrably substantially flush with the upper surfaces of the ribs 2 so that the bottoms of the gratebars will not only rest on .said ribsfbut 75 also against the tops of the projections or lugs, Vthe latter-,resisting downward sagging By preference the projections or lugs 5 have downwardly wardly, `substantially. Hush with the tops of theribs 2, for engagement with the gratebars, preferably at their central portions, on opposite sides ofthe central ribs 8. The downwardly inclined outer surfaces 5 of the projections or lugs 5 are of advantage, since said surfaces will permit material that may fall through the gratebars to drop away so as .90 not to lodge on and block up any openings.

When my improved pallets are used in a sintering machine the gratebars will not only be supportedvalong their longitudinal edge portions by the ribs 2 but intermediate portions of the said bars will be supported and sagging, warping and bending thereof resisted by the projections or lugs when the bars become heated trom the burning load of material thereon. During operation of a 100 sintering machine the loaded pallets run down the curved tracks at the discharge end of the machine and bump against one another successively with considerable force. With my improvement th-e ribs 8 of the gratebars will it quite close tothe adjacent ends of the projections or lugs 5 so that when a pallet bumps against another pallet a head on the curved discharge tracks lateral movement of the gratebars will be resisted and limited by the corresponding projection or lug 5 to prevent sideways or edgewise bending of said bars. By the means described wear on and injury to the gratebars will be greatly reduced over that customary in pallets and the longevity of the said bars will be increased with consequent reduction in expense.

Having now described my invention what I claim is:

l. A pallet Jfor sintering machines having spaced ribs and openings therebetween, said ribs being providedy with projections to engage portions of gratebars resting on the pallet.

2. A pallet for sintering machines having spaced ribs and openings therebetween, said ribs being provided with projections located in said openings to engage portions of gratebars in said openings.

3. A pallet for sintering machines having spaced ribs and openings therebetween, said ribs having opposing projections spaced apart within said openings to limit the lateral movement of ribs depending from gratebars on the pallet to resist lateral movement of said gratebars.

4. A pallet as set forth in claim 3 in which the projections are provided with downwardly and outwardly extending surfaces.

5. A pallet for sintering machines having openings and laterally extending projections within said openings, and gratebars having depending ribs entering said openings to engage said projections. l

6. A pallet Jfor sintering machines having openings and laterally extending opposing projections spaced apart within said openings, and gratebars having depending ribs entering said openings and the spaces between said projections to oppose the latter.

HENRY J. STEHLI. 

